You guys miss my point. it's not about how much it changes the character. It's about whether it's a change that's a true retcon, meaning they thought of it afterward and were like hey let's change that aspect of the character, OR a character that was designed in a way, then got his version in the film, and the film didn't turn out to be exactly as the director wanted regarding this point. We all know Star Wars was a pioneering film and didn't exactly have everything going for it. Maybe they were behind on shooting and just accepted the way the scene came out at that time, oir were forced to.
All I'm saying is if Lucas had always intended Han to shoot second, which he claims, then it's a logical 'repair' ad people should just accept Han never was what they thought in this regard. You can then blame Lucas for THAT, which I can get, but then imo you have beef with how Lucas meant the character in the first place... And/or his ability to put that on screen the first time.
Now you can not believe Lucas when he says he always intended it this way, but initially I don't see why you wouldn't. If anyone wants to present arguments why Lucas just made this up to validate his retcon, go ahead. I just think that if it's true Lucas had always intended Han to not shoot first, then it's not a true retcon to 'fix' the original scene.